Producing hydrogen.



ED ES PATN Firm.

l u i a u ALWIN MITTASCH, OF LUDWIGSHAFEN-ON-THE-RHINE, GERMANY, ASSIGNOR TO ALIEN PROPERTY CUSTODIAN.

rnonucme HYDROGEN.

1,301,151. No Drawing.

To all whom it may concern.

Be it known that I, Anwm Mrrrnson, a citizen of the German Empire, residing at Ludwigshafen-on-the-Rhine, Germany, have invented new and useful Improvements in Producing Hydrogen, of which the following is a specification.

It has been found that the catalytic conversion of carbon nionoxid and steam into hydrogen and carbon dioxid canybe carried out advantageously by passing gases containing carbon monoxid and steam :at a raised temperature over an oxygen com- .pound of one or .more of the rare earth metals (see Meyer, Zz'ebschrift Ezektrochcmz'e 17, 633) and in particular of cerium. It is preferred to employ the said oxygen compound in a finely divided :or finely porous form; for instance, the precipitated hydroxid can be brought into suitably shaped lumps by itself or while employing a binding, or diluting agent, whereupon the lumps are heated and a gas mixture is passed over the catalytic agent.

The following example will serve to illustrate further the nature of this invention, which, however, is not confined to this example.

E'wmnple. Precipitate a hot solution of cerium ni- Specification of Letters Patent.

and car Patented Apr. 22, 1919.

Application flied June 25, 1914. Serial No. 847,324.

trate by means of ammonia, filter ofi the cerium hydroxid and dry it somewhat, form it into suitably shaped lumps and then heat it again. Then pass a mixture containing carbon monoxid and steam over the lum s at a temperature of :from 500 to 600 whereuppn a rapid conversion to hydrogen on dioxid takes place.

In this application Ido not claim the spe- 40 cific production of hydrogen by passing carbon monoxid and steam over a catalytic agent containing an oxid of a rare earth metal and a body promoting the activity of the said oxid, since this is claimed in the application Serial No. 842,954, but what I claim is:-

1. The process of producing hydrogen by passing carbon monoxid and steam over a heated catalytic agent containin an oxygen compound of a rare earth -meta l 2. The process of producing hydrogen by passing carbon monoxid and steam over a heaged catalytic agent containing cerium 0x1 In testimony whereof I have hereunto set. my hand in the presence of two subscribing H. MERLE Coonmm. 

